Improving Thermal Stability of Photoluminescence in Violet-emitting CsPbCl3 Perovskite Nanocrystals Using Ni Doping

被引：0
|
作者：
Chen X.-H. [1 ]
Xing K. [2 ]
Cao Z. [2 ]
Yuan X. [2 ]
Zhao J.-L. [2 ]
机构：
[1] School of Science, Northeast University, Shenyang
[2] Key Laboratory of Functional Materials Physics and Chemistry of The Ministry of Education, Jilin Normal University, Siping
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2019年 / 40卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Doping; Perovskite; Photoluminescence; Quantum yield; Thermal stability;
D O I：
10.3788/fgxb20194010.1220
中图分类号：
学科分类号：
摘要：
In order to effectively improve the thermal stability of luminescence in violet-emitting CsPbCl3 perovskite nanocrystals(NCs), the effects of various Ni doping concentrations on their structural and luminescent properties were studied. The Ni doped CsPbCl3 (Ni:CsPbCl3) NCs with various Ni doping concentrations were synthesized at 190℃ by varying the feed Ni/Pb molar ratio. It was found that the quantum yield of 405 nm photoluminescence band in Ni:CsPbCl3 NCs was significantly improved up to 54% with increasing the Ni/Pb feed molar ratio while it started to drop after the molar ratio was higher than 4:1. This is because the nucleation and growth processes of the NCs were influenced in the presence of high concentration NiCl2. In addition, it was observed that the average sizes of Ni:CsPbCl3 NCs were reduced with increasing Ni/Pb molar ratio. The temperature-dependent photoluminescence spectra demonstrated that the Ni doping really reduced thermal quenching of photoluminescence in Ni:CsPbCl3 NCs and greatly enhanced their thermal stability. The experimental results indicated that the enhancement mechanism of luminescence in violet-emitting Ni:CsPbCl3 NCs was attributed to reduction of defects in NCs with Ni doping. © 2019, Science Press. All right reserved.
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页码：1220 / 1227
页数：7
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